Added cta-immutable-file-test RPM to client.sh

continuousintegration/docker/ctafrontend/cc7/opt/run/bin/client.sh

@@ -7,7 +7,7 @@ if [ ! -e /etc/buildtreeRunner ]; then
   yum-config-manager --enable ceph
 
   # Install missing RPMs
-  yum -y install cta-cli cta-systemtest-helpers cta-debuginfo xrootd-client eos-client jq python36
+  yum -y install cta-cli cta-immutable-file-test cta-systemtest-helpers cta-debuginfo xrootd-client eos-client jq python36
 
   ## Keep this temporary fix that may be needed if going to protobuf3-3.5.1 for CTA
   # Install eos-protobuf3 separately as eos is OK with protobuf3 but cannot use it..